* { margin: 0; padding: 0; }

    html { height: 100%; }
    body { height: 100%; background: #333 url(img/backgroud.png) 50% 50% no-repeat; background-size: cover;}
    .dowebok { position: absolute; left: 50%; top: 50%; width: 430px; height: 550px; margin: -300px 0 0 -215px; border: 1px solid #fff; border-radius: 20px; overflow: hidden;}
    .logo { width: 104px; height: 104px; margin: 50px auto 80px; background: url(img/login.png) 0 0 no-repeat;  }
    .form-item { position: relative; width: 360px; margin: 0 auto; padding-bottom: 30px;}
    .form-item input { width: 360px; height: 48px; padding-left: 70px; border: 1px solid #777; border-radius: 25px; font-size: 18px; color: #fff; background-color: transparent; outline: none;}
    .form-item button { width: 360px; height: 50px; border: 0; border-radius: 25px; font-size: 18px; color: #1f6f4a; outline: none; cursor: pointer; background-color: #fff; }
    #username { background: url(img/emil.png) 20px 14px no-repeat; }
    #password { background: url(img/password.png) 23px 11px no-repeat; }
    .tip { display: none; position: absolute; left: 20px; top: 52px; font-size: 14px; color: #f50; }
    .reg-bar { width: 360px; margin: 20px auto 0; font-size: 14px; overflow: hidden;}
    .reg-bar a { color: #777; text-decoration: none; }
    .reg-bar a:hover { text-decoration: underline; }
    .reg-bar .reg { float: left; }
    .reg-bar .forget { float: right; }
    .dowebok ::-webkit-input-placeholder { font-size: 18px; line-height: 1.4; color: #fff;}
    .dowebok :-moz-placeholder { font-size: 18px; line-height: 1.4; color: #fff;}
    .dowebok ::-moz-placeholder { font-size: 18px; line-height: 1.4; color: #fff;}
    .dowebok :-ms-input-placeholder { font-size: 18px; line-height: 1.4; color: #fff;}

    @media screen and (max-width: 500px) {
        * { box-sizing: border-box; }
        .dowebok { position: static; width: auto; height: auto; margin: 0 30px; border: 0; border-radius: 0; }
        .logo { margin: 50px auto; }
        .form-item { width: auto; }
        .form-item input, .form-item button, .reg-bar { width: 100%; }

    }
}